Woolworths not updating their system

I provided woolworths with the paid up letter for my Woolworths account in November 2019, where the costumer service sent me an email confirming that the account is paid up, and they are busy updating their system. Still today, 13 January 2020 my woolworths account shows the outstanding balance that was already paid. This is very stressful to me, because i spend a lot of money and time getting debt free, and i dont feel debt free if i still see balances owed by me on their system that is not true. Their last reply on email was that they can not tell me when it will be sorted out, and that i should be patient...